Figure 9.

Separate time course of change preference (left) and median of mean change preference scores collapsed over the entire preference score window (right) in Experiment 2 for trials in which the second-appearing item changed (top) and trials in which the first-appearing item changed (bottom). In the time course plots, samples in which the preferences differs significantly from chance are indicated with an asterisk. Note in the bottom graph, infants begin to prefer the second onset item before the change, and maintain a preference for that item after the change, despite the fact it is the non-changing item. In the collapsed data, each circle represents the preference score from a single infant. The black line within the cloud of circles indicates the mean of the median preference scores, with the 95% confidence interval shown by the gray error bars.